Secretary of State Hillary Clinton was treated with blood thinners on Monday at a New York hospital to help dissolve a blood clot in her head and doctors were confident she would make a full recovery .

Clinton was admitted to New York Presbyterian Hospital on Sunday due to the clot that was discovered during a follow-up exam related to a concussion she suffered this month , her spokesman , Philippe Reines , said .

The clot was located in the vein between the brain and and the skull behind Clinton 's right ear and did not result in any stroke or neurological damage , her doctors said in a statement .

Clinton was treated with blood thinners to help dissolve the clot and would be released once the medication dose had been established , they said .

`` In all other aspects of her recovery , the secretary is making excellent progress and we are confident she will make a full recovery . She is in good spirits , engaging with her doctors , her family , and her staff , '' Clinton 's doctors said .

Blood clots : 4 things you need to know

Clinton , 65 , was suffering from a stomach virus earlier this month when she fainted because of dehydration , causing the concussion .

Blood clots `` are clumps that occur when blood hardens from a liquid to a solid , '' according to the National Institutes for Health .

Clots can form inside veins or arteries or even the heart , the NIH says . `` A blockage in the vein will usually cause fluid buildup and swelling , '' the NIH website says . Among the possible threats : Sometimes , a `` clot can break loose and travel from one location in the body to another . ''

Read more : Hillary Clinton fast facts

Clinton spent the holidays with her family last week after working from home .

She was scheduled to return to work at the State Department this week after being sidelined for most of the past month .

Her illness forced her to bow out of testifying on December 20 before the House Foreign Affairs Committee on the deadly September attack on the U.S. diplomatic compound in Benghazi , Libya .

Clinton , a one-time presidential candidate who is the source of constant speculation she might run again in 2016 , plans to step down from the State Department once a replacement is confirmed by the Senate .

President Barack Obama has nominated Sen. John Kerry to succeed her .

Report blames poor security , inadequate response in Benghazi attack

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The clot was found in the vein between the brain and the skull behind her right ear

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It did not result in a stroke or neurological damage , Clinton 's doctors said

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Clinton 's doctors expect her to make a full recovery